Please see pages 440-441 of the D4 manual for information on calibrating EN-EL18 batteries with the MH-26 charger. These pages include a chart that shows how to use the charger's lights to determine the approximate amount of time that will be needed for calibration. A copy of the D4 manual can be downloaded from here: https://support.nikonusa.com/app/an...
answered 1 month, 3 weeks ago
1 month, 3 weeks ago